Collective motion in nucleus-nucleus collisions at 800 MeV/nucleon

  • Semicentral Ar+KCl, La+La, and Ar+Pb collisions at 800 MeV/nucleon were studied using a streamer chamber. The results are analyzed in the framework of the transverse momentum analysis and in terms of the average sphericity matrix. A critical examination of the analysis procedures, both experimental and theoretical, is given. New procedures are described to account for overall momentum conservation in the reaction, and to correct for azimuthal variations in the detection efficiency. Average transverse momenta per nucleon in the reaction plane are presented for deuterons emitted in the forward hemisphere, as these provide the most reliable information. A Vlasov-Uehling-Uhlenbeck calculation with a stiff equation of state gives a good fit to the momenta in the Ar+Pb reaction. Flow effects parametrized further using the sphericity tensor are found stronger than in the cascade model and consistently weaker than predicted by hydrodynamics. Parameters from the sphericity tensor exhibit a larger variation as a function of multiplicity than do the average momenta per nucleon.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Author:Pawel DanielewiczORCiDGND, Herbert Ströbele, Grazyna Janina Odyniec, Dietmar Bangert, Rudolf BockGND, Robert Brockmann, John W. HarrisORCiDGND, Howel G. Pugh, Wolfgang Rauch, Rainer Arno Ernst Renfordt, Andres SandovalORCiD, Dietmar Schall, Lee S. Schroeder, Reinhard StockGND
Parent Title (German):Physical Review C
Document Type:Article
Date of Publication (online):2005/10/14
Year of first Publication:1988
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/14
Page Number:15
First Page:120
Last Page:134
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht